AFNI Message Board

Dear AFNI users-

We are very pleased to announce that the new AFNI Message Board framework is up! Please join us at:

https://discuss.afni.nimh.nih.gov

Existing user accounts have been migrated, so returning users can login by requesting a password reset. New users can create accounts, as well, through a standard account creation process. Please note that these setup emails might initially go to spam folders (esp. for NIH users!), so please check those locations in the beginning.

The current Message Board discussion threads have been migrated to the new framework. The current Message Board will remain visible, but read-only, for a little while.

Sincerely, AFNI HQ

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PSFB
May 07, 2004 04:41PM
When I multiple a mask consisting of all 1's or zero's by a mask that contains values of 0, 2 or -2 I only get positive values out. This happens in voxels where a "-2" voxels clearly overlaps a "1" voxel in the other mask (i.e. the result is 1 * (-2) = 0 ).


Here's my 3dcalc line:

3dcalc \
-a bin.maskFxAxE+orig \
-b mask.func+orig \
-prefix mask.func2 \
-expr "a*b"


3dinfo on "mask.func2+orig" will show values ranging from 0 to 2.

Any ideas?

Thanks
PSFB
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Subject Author Posted

3dcalc question

PSFB May 07, 2004 04:41PM

Re: 3dcalc question

Tom Ross May 07, 2004 04:56PM

Re: 3dcalc question

PSFB May 07, 2004 04:59PM